The river is rather short but characterized by two long hypogeum sections, respectively, below the Orocco quarter and under the former Whirpool. It is, therefore, a rare itinerary of urban speleo-canyoning. After heavy rain, you will find clean water, otherwise it will be rather dry with stagnating water.

The river is rather short but characterized by two long hypogeum sections, respectively, below the Orocco quarter and under the former Whirpool. It is, therefore, a rare itinerary of urban speleo-canyoning. After heavy rain, you will find clean water, otherwise it will be rather dry with stagnating water.

Downstream: coming from Varese (Via Borghi) go past the former Whirpool and turn left into Via Beut. Cross the bridge over the railway (Via Piave), make the hairpin to the left and after the bend to the right take the side street on the left (Via Piave, 44) in correspondence with the maritime pine. Continue until you reach the end of the street and park asking permission from the locals (45°50'21.5"N 8°43'59.8"E). Upstream: return to Via Borghi, turn right past the Whirpool and turn left into Via Orocco. Turn right into Via Valle Oro and park immediately on the left (45°50'34.5"N 8°44'12.1"E)

Get down to the riverbed at the side of the entrance of the first gallery.

01- C15 (1 sx) 02- C7 (ferrata) 03- C10 (ferrata)

After the second canyon, the stream is visibly horizontal. Exit on the right bank just at the downstream parking lot.